Just thought I would share a couple of pics from the Iowa State Fair. The lightbar display is in the Hall of Law and are from the Iowa State Patrol showing what they used in the past. The Twinsonic is an actual CTS that looked like it was brand new out of the box.
That is an interesting setup. Just remove a rotator from the inner passenger side, replace with another idler gear and then tap holes in the frame for that Par 36 holder. You'd have to do some fiddling to get it to fit just right.
I've always wanted to do that: reverse a 24E and get the 3 rotators outside and mount the PARs next to the speaker housing. The outer holes for the end side rotators are already there, You'd have to tap holes for the pars, as someone said before, and probably remove the back "tab" of plastic aft of the plastic PAR holder, so as not to rub against the gears. And you'd have the proper-side-warning Aerodynic just there